.header-center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width:380px;
}
.login-body {
    background-size: cover;
    height: 1200px;
}

.login-panel {
    padding: 2  0px 10px;
    
    width: 500px;
    min-height: 400px;
    /* padding: 50px 20px; */
    margin: 0 auto 0 auto;
}

.cover-back {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .7);
    transition: background-color 1s linear;
}


